ERG11) Gene of Moniliophthora Perniciosa

Genetics and Molecular Biology, 37, 4, 683-693 (2014) Copyright © 2014, Sociedade Brasileira de Genética. Printed in Brazil www.sbg.org.br Research Article Analysis of the ergosterol biosynthesis pathway cloning, molecular characterization and phylogeny of lanosterol 14 a-demethylase (ERG11) gene of Moniliophthora perniciosa Geruza de Oliveira Ceita1,4, Laurival Antônio Vilas-Boas2, Marcelo Santos Castilho3, Marcelo Falsarella Carazzolle5, Carlos Priminho Pirovani6, Alessandra Selbach-Schnadelbach4, Karina Peres Gramacho7, Pablo Ivan Pereira Ramos4, Luciana Veiga Barbosa4, Gonçalo Amarante Guimarães Pereira5 and Aristóteles Góes-Neto1 1Laboratório de Pesquisa em Microbiologia, Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Feira de Santana, BA, Brazil. 2Centro de Ciências Biológicas, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, PR, Brazil. 3Laboratório de Bioinformática e Modelagem Molecular, Departamento do Medicamento, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, BA, Brazil. 4Laboratório de Biologia Molecular, Instituto de Biologia, Departamento de Biologia Geral, Universidade Federal da Bahia, Salvador, BA, Brazil. 5Laboratório de Genômica e Proteômica, Departamento de Genética e Evolução, Universidade Estadual de Campinas, Campinas, SP, Brazil. 6Centro de Biotecnologia e Genética, Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil. 7Laboratório de Fitopatologia Molecular, Centro de Pesquisas do Cacau, Ilhéus, BA, Brazil. Abstract The phytopathogenic fungus Moniliophthora perniciosa (Stahel) Aime & Philips-Mora, causal agent of witches’ broom disease of cocoa, causes countless damage to cocoa production in Brazil. Molecular studies have attempted to identify genes that play important roles in fungal survival and virulence. In this study, sequences deposited in the M. perniciosa Genome Sequencing Project database were analyzed to identify potential biological targets. For the first time, the ergosterol biosynthetic pathway in M. perniciosa was studied and the lanosterol 14a-demethylase gene (ERG11) that encodes the main enzyme of this pathway and is a target for fungicides was cloned, characterized mo- lecularly and its phylogeny analyzed. ERG11 genomic DNA and cDNA were characterized and sequence analysis of the ERG11 protein identified highly conserved domains typical of this enzyme, such as SRS1, SRS4, EXXR and the heme-binding region (HBR). Comparison of the protein sequences and phylogenetic analysis revealed that the M. perniciosa enzyme was most closely related to that of Coprinopsis cinerea. Keywords: Basidiomycota, fungus, ergosterol, Theobroma cacao. Received: April 11, 2014; Accepted: June 4, 2014. Introduction eases in cocoa, the basidiomycete Moniliophthora Cocoa (Theobroma cacao L.) cultivation has suffered perniciosa (Stahel) Aime & Philips-Mora has received significant production losses because of diseases that affect considerable attention because it is the causal agent of its crops (Pereira et al., 1989; Purdy and Schimidt, 1996; witches’ broom disease (Griffith et al., 1994, 2003; Aime Evans, 2007). Among the main pathogens that cause dis- and Phillips-Mora, 2005). Moniliophthora perniciosa has biotrophic and sapro- Send correspondence to Aristóteles Góes-Neto. Laboratório de phytic stages (Griffith et al., 2003; Meinhardt et al., 2006). Pesquisa em Microbiologia, Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Avenida Transnor- The biotrophic stage is characterized by basidiospore infec- destina, 44036-900 Feira de Santana, BA, Brazil. E-mail: tion in meristematic regions that leads to hypertrophy of in- [email protected]. fected tissues and the proliferation of abnormal axillary 684 Ceita et al. branches known as green brooms. In the saprophytic stage, ously known as Monilia fructicola (Luo and Schnabel, basidiomata that sporulate on plant material are generated 2008), Pneumocystis carinii (Morales et al., 2003), and dry brooms occur as a result of cell death in infected tis- Saccharomyces cerevisiae (Kalb et al., 1987), Oculimacula sues (Ceita et al., 2007), one of the characteristic symptoms yallundae, previously known as Tapesia yallundae (Wood of this disease. Oxalate production and calcium oxalate et al., 2001), Uncinula necator (Délye et al., 1997) and crystal accumulation also play a role in the pathogenesis of Ustilago maydis (Lamb et al., 1998). The ERG11 gene also witches’ broom disease (Rio et al., 2008). has an important role in the steroid biosynthetic pathways The action of azole-group antifungals has created of bacteria, plants and mammals in which its gene product new perspectives for controlling witches’ broom in cocoa has the same metabolic role as its fungal counterpart (Roz- trees and has highlighted the importance of analyzing er- man et al., 1996; Bak et al., 1997; Bellamine et al., 1999; gosterol biosynthesis in M. perniciosa in order to develop Jackson et al., 2003; Pietila et al., 2006). specific inhibitors of this pathway (McQuilken and In this report, we describe the first identification, mo- Rudgard, 1988; Mota et al., 2010). To accomplish this, it is lecular characterization, cloning and phylogenetic analysis essential to study the development of the disease from mo- of the ERG11 gene that encodes lanosterol 14a-deme- lecular and biochemical perspectives. In this sense, the se- thylase, an enzyme that is essential for the survival and quencing of the M. perniciosa genome has led to the pathogenicity of M. perniciosa. The results presented here discovery of genes that are essential for metabolism and de- should be useful in identifying antifungal drugs active velopment in this species and has resulted in several studies against this enzyme and, consequently, in controlling that have focused on gene expression analysis (Formighieri witches’ broom disease in cocoa trees. et al., 2008; Mondego et al., 2008). Analyses of the biotrophic and saprophytic stages of Materials and Methods M. perniciosa revealed high gene expression levels of the cytochrome P450 superfamily, this altered expression in- Ergosterol pathway in Moniliophthora perniciosa and cluded lanosterol 14a-demethylase, a key enzyme in the er- sequence analyses gosterol biosynthetic pathway in fungi that is a target for antifungals and is encoded by the ERG11 gene (Rincones et The sequences examined in this work were retrieved al., 2008; Pires et al., 2009). Lanosterol 14a-demethylase from the Moniliophthora perniciosa Genome Sequencing belongs to the CYP51 family of the cytochrome P450 Project database (www.lge.ibi.unicamp.br/vassoura/) and superfamily, which is notable for being the only were used as the primary source for identifying genes of the cytochrome P450 family that is present in all biological ergosterol biosynthetic pathway in M. perniciosa. With this kingdoms (Waterman and Lepesheva, 2005; Lepesheva database, it was possible to obtain the genomic consensus and Waterman, 2007). sequences that were predicted to encode the main enzymes a Antifungals that affect the ergosterol biosynthetic of this pathway, such as lanosterol 14 -demethylase, and to pathway have been used for decades. Azole-group anti- compares these sequences with those from other organ- fungals are potentially useful disease-modulating agents isms. because of their specific binding to lanosterol 14a-deme- The genes were accurately analyzed using ab initio thylase and their selective inhibition of the removal of the programs for gene prediction, such as AUGUSTUS (Stan- methyl group by this enzyme, which leads to the accumula- ke et al., 2006) and GeneMark (Ter-Hovhannisyan et al., tion of unsaturated intermediates and to the depletion of er- 2008). These analyses were then combined with the Basic gosterol (Hof, 2001; Carrillo-Muñoz et al., 2006; Sheng et Local Alignment Search Tool (BLAST) algorithm (Alts- al., 2009). Ergosterol is an important component of the fun- chul et al., 1990) to align the sequences with those of phylo- gal cell membrane that regulates membrane fluidity and genetically related species. This approach allowed the permeability (Barrett-Bee and Dixon, 1995; Lees et al., identification of expressed regions, the presence and num- 1995; Veen and Lang, 2005). ber of introns, and of regions bordering the ERG11 gene. The ERG11 gene sequences of a wide range of fungal BioEdit software (v. 7.1.3) (Hall, 1999) was used to align species that are harmful to agricultural crops and human the predicted genomic DNA and cDNA sequences with se- health have been determined and characterized. These spe- quences determined by sequencing. cies include Antrodia cinnamomea (Lee et al., 2010), Signal peptide prediction was done using SignalIP Aspergillus fumigatus (Mellado et al., 2001; Warrilow et 4.0 software (Petersen et al., 2011), and probable trans- al., 2010), Botrytis cinerea (Albertini et al., 2002), membrane domains were determined using the Phobius Candida albicans (Lai and Kirsch, 1989; Park et al., 2011), program (Kall et al., 2007). The ProtoParam tool was used Candida glabrata (Kairuz et al., 1994), Cryptococcus to analyze the physical and chemical parameters of the pro- neoformans (Revankar et al., 2004; Sheng et al., 2009), teins, such as the theoretical isoelectric points (pIs) and mo- Penicillium digitatum (Zhao et al., 2007), Malassezia lecular masses (Gasteiger et al., 2005). Additionally, the globosa (Kim et al., 2011), Monilinia fructicola, previ- conserved

Load more